Thanks for your post, you can buy from our official secured website now:
https://minereu.com/

Gridseed USB miners are currently on sale with very competitive prices.
per unit prices are
235   for 1 set
231   for 5 sets
229   for 10 sets
224   for 15 sets
220   for 20 sets
218   for 25 sets
212   for 30 sets
203   for 50 sets
190   for 100+ sets