Just perused KEH and 1D3's are under $500...though I'd slam their "Bargain" billing and buy the $373 one. Hint.
A 7D is a fhuqking buckboard wagon,pulled by a 3-legged Sloth,in comparison. With the '3,you'll be able to see where it's you or the mechanics,which is why you started the Thread. Hint.
KNOWING,trumps Guessing.
Hint............................