I have been wathching an EF 135 f/2L on eBay. 3 day listing, about 15hrs left, 0 bids yet, starting at $650.00. Looks ok & reads ok. Have one of these on the wishlist albeit a little ways down the line. Very tempting though, given the cost of a new one, if next to no bids at ending. What to do? Stick to the guns & plan or take the plunge on a bargain?