Below is my Critical review on all top cheap Seedbox,

The value/price of a seedbox to be cheap or not, is calculated here on the basis of  cost/GB

You can check the below analysis hope it helps you make decision.I would recommend that if you are just starting with seed boxes keep the HDD space a critical component because you will only make a good ratio if you are seeding a quite a lot of torrents and if you run out of space it will be a serious handicap, atleast get 200 GB and my recommendation is minimum 300 gb also I have listed the cheapest seedboxes .

The below seed boxes I would recommend based on the speed and the amount of hdd they are providing, if you are a beginner I think you should definitely start with any of the below seed boxes.Also note that 1 200 GB seedboxes have been listed because if you are looking for 1GBPS bandwidth this is the cheapest seedbox available at that price.

Seedstuff 100Mbps 60GB Unmetered Yes No limit 10$ Very Fast
Seedbox Hosting Speed Space Bandwidth Cost Per GB Cost
Pulsemedia Cheap Seedbox 100Mbit 750 GB Unmetered 17$ 0.02
SSDAPP Cheap Seedbox  1 GBit  100 GB  Unmetered 6  euro 0.02 
Ultraseedbox Cheap Seedbox 1 Gbit 450gb 2 GB 9.9 Euro 0.035
Fusion VPS Cheap Seedbox 250Mbit 333GB Unmetered 17$ 0.05
Dedi Seedbox  Cheap Seedbox  1 Gbit 100 Gb Unmetered 15$ 0.1
Seedboxsolutions Cheap Seedbox 1Gbit/200Mbit 300 GB Unmetered 20$ 0.06
Ultraseedbox Cheap Seedbox 1Gbit 450GB Unmetered 32$ 0.07
ssdapp  Cheap Seedbox 1Gbit 200GB Unmetered 15$ 0.075
Dedi Seedbox  Cheap Seedbox 1Gbit 200GB Unmetered 20$ 0.1
ROSE hosting VPS 100Mbit 30 Unmetered 20$ 0.66

Second Tier Seedboxes.

Seedbox Hosting Speed Space Bandwidth Cost Per GB Cost
SNTHostings 100 Mbit 60+20 GB Unmetered 6.29$ 0.07
Fibrenetworks 100Mbit 250 GB Unmetered 19$ 0.7
Underleech 100mbit 210 GB Unmetered /VPN 16$ 0.7
Estroweb 1 Gbit 120 GB Unmetered 19$ 0.15
           
Superseedbox 100Mbit 35 GB Unmetered 15$ 0.4
             

Below listed are all the major providers of cheap and low end seed boxes , though some of them are cheap but definitely check the various parameters as HDD space, number of active torrents etc before buying them.If you find any other cheap seedbox providers please put it in comments.

Price / Month in USD Server Bandwidth (Mbit/s) Limitations & Extras▲ Website GigaByte Price per GB (USD)
1.27 100 Limited to 2 active Torrents http://www.yourseedbox.com/ 5 0.254
2.56 100 Limited to 2 active Torrents http://www.yourseedbox.com/ 10 0.256
5 100 Limited to 5 active Torrents http://www.iseedbox.net/ 25 0.2
5.13 1000 (blank) http://www.fibrenetworks.org/ 20 0.2565
6.42 100 Limited to 5 active Torrents http://www.yourseedbox.com/ 25 0.2568
  1000 (blank) http://www.fibrenetworks.org/ 25 0.2568
7.71 1000 (blank) http://www.fibrenetworks.org/ 45 0.1713333
10 100 Limited to 7 active torrents http://www.iseedbox.net/ 50 0.2
  200 Limited to 3 active Torrents http://www.seedbox.me/ 10 1
10.28 1000 (blank) http://www.fibrenetworks.org/ 50 0.2056
11 100 (blank) http://superseeder.eu/ 110 0.1
11.16 100 Limited to 15 active torrents http://www.sboxes.net/ 95 0.1174737
11.52 100 (blank) http://www.pulsedmedia.com/ 70 0.1645714
12.8 100 (blank) http://www.pulsedmedia.com/ 60 0.2133333
12.86 100 Limited to 10 active Torrents http://www.yourseedbox.com/ 45 0.2857778
  1000 (blank) http://www.fibrenetworks.org/ 75 0.1714667
14.95 100 Limited to 6 active Torrents http://www.superseedbox.com/ 35 0.4271429
15 100 Limited to 15 active torrents http://www.iseedbox.net/ 75 0.2
    Limited to 6 active Torrents http://www.seedcafe.info/ 30 0.5
    (blank) http://whatbox.ca/ 115 0.1304348
      http://www.ggshq.com/ 100 0.15
  200 Limited to 5 active Torrents http://www.seedbox.me/ 15 1
  1000 Limited to 2 active Torrents http://www.seedbox.me/ 20 0.75
    (blank) http://whatbox.ca/ 150 0.1
15.22 2000 (blank) https://www.feralhosting.com/ 333 0.0457057
15.43 1000 (blank) http://www.fibrenetworks.org/ 75 0.2057333
16.72 100 Limited to 25 active Torrents http://www.yourseedbox.com/ 100 0.1672
  1000 (blank) http://www.fibrenetworks.org/ 45 0.3715556
        125 0.13376
        150 0.1114667
16.73 100 Limited to 3 active Torrents http://www.iseedbox.com/ 150 0.1115333
17 100 Limited to 4 active Torrents http://www.blazinseedboxes.com/ 25 0.68
    (blank) http://bigsb.net/ 100 0.17
        130 0.1307692
17.37 100 (blank) http://www.bytesized-hosting.com/ 110 0.1579091
      http://www.fastsh.it/ 100 0.1737
17.95 100 Limited to 3 active Torrents http://www.xirvik.com/ 20 0.8975
    (blank) http://www.pulsedmedia.com/ 115 0.156087
18 1000 3USD for 2.5TB additional BW http://whatbox.ca/ 100 0.18
18.02 100 Limited to 4 active Torrents http://www.seedhost.eu/ 55 0.3276364
18.27 100 (blank) http://www.seednet.eu/ 50 0.3654
19.24 500 (blank) http://www.pulsedmedia.com/ 120 0.1603333
19.29 1000 (blank) http://www.fibrenetworks.org/ 75 0.2572
        175 0.1102286
19.3 100 Limited to 4 active Torrents http://www.iseedbox.com/ 180 0.1072222
    Limited to 5 active Torrents http://www.seedhost.eu/ 200 0.0965
20 100 Limited to 14 active torrents http://http://www.eliteseeders.comxa.com/ 100 0.2
  200 Limited to 7 active torrents http://www.seedbox.me/ 25 0.8
    (blank) http://www.seedbox.me/ 25 0.8
  1000 Limited to 15 active torrents http://www.iseedbox.net/ 100 0.2
    (blank) http://www.seedstorm.com/ 150 0.1333333
20.58 1000 (blank) http://www.fibrenetworks.org/ 125 0.16464
        250 0.08232
20.91 100 (blank) http://www.fastsh.it/ 100 0.2091

plan 2 seedbox

Dedisreturn 100Mbps 500GB 5TB YES No Limit 19.99$ Very Fast