There were some guys from here and other boat building sites that relayed disaster stories about cheap ebay resins. I'd buy locally or from a trusted supply retailer cause it would be a disaster if it doesn't cure right.
If its on ebay it must be legit... Not. Probably been sittin on the shelf so long the resin died. Also to my undestanding ups/fedex has problem with shipping flammable materials such as resin, gelcoat, mek,waxsol etc..