I'm finally ready to buy this lens. My camera is a GM1 (which I plan to keep since Olympus won't make a PM3) and my older adapted lenses are a bit big for the GM1. I'm just going to go for an A7 to use my adapted 50/1.7, 85/1.8, etc. So for the GM1 my kit will be 12-32, 20, 42/1.7, 35-100. All small and capable. Anyway, I refuse to buy from Amazon. I'd bet anyone $20 that the lenses that only 99% passed Panasonic's spec tests (off center, micro scratches on finish, etc.) are sold to Amazon at a discount. I like to buy from B&H. But it's $350 right now and I can get it on Ebay for $290. I usually pay a bit more to get it from a reputable store like Cameta, B&H, Panny.com etc for their return policy (never had to return anything though!), but I'd like to not spend an extra $60 to do so. Any advice?