Restocking is good when you've over three months, but even that is too slow in my book.
Sniping is alright, but that requires luck and auctions to actually go through.
Food club is okay, a MUCH slower method in my opinion though.
Best way overall is reselling, though it's arguable since so many people take more losses than they profit.
Feel free to PM me if you want some tips/tricks on reselling or if you need some prices @(you need an account to see links)
I'd be more than willing to help out. =)