That 50mm lens alone goes for $250-350 on KEH! Get the kit now and ask questions later. Heck, use it for a while, and if its too much, sell it here to make all of your money back plus some.

Unless the bellows have holes in them, all of the shutters are completely worn out, the backs have light leaks and the lenses have fungus, that kit is worth well over $1000.