Not to be a jerk here, Never take a sellers word on a camera and its history....Ever! Always plan on sending it in for a C.L.A. Should be the 1st thing you do before you even bother putting a roll of film in it...I recommend Youxon Ye for the work, he is honest, priced correct for the work he does, and I have always had a pretty fast turn around. That way when you get the camera back you know it should be good to go. Adapter wise, when I bought my M2 (my 1st M) all I had were Leitz screw mount lenses. I bought a cheap adapter...said it was American made rather than the cheap Chinese ones with known problems...well nope didn't even come close to going on the camera all the way...after that decided that it's a expensive camera (for me) but I'm already paid into ownership, why would I buy a cheap adapter? you will always be better off with a Leitz product than a aftermarket one. Keep a look out on eBay for a Leitz one make sure it has M2 and M3 stamped on it...they run about $75, but do come up cheaper...if you look at the camera as a lifelong companion...what you spend on quality is worth it