Ive been looking through on this and ebay scams from pay pal most likely steals your money some times or your thing never get delivered so if anybody knows of an site or somebody who might be selling grid seeds nobody who scams or rips me off because I know the average prices. 
If you buy through ebay and use paypal you can charge back if the user attempts to scam you.
Find a reputable dealer on here. They do exist. Just use your discretion.
Cheers,
Kyle.T