aldine, the Monitor 10As are the best of the Monitor 10s as they have the Peerless tweeter so, if they are in nice condition, I think that is a fair price and they are well worth it. I would highly recommed your getting the Monitor 10As. I have two pair and love them. I also own the Monitor 7Bs. I bought my 7Bs locally for $120 last year so $140 for the Monitor 7Bs is a little on the high end but perhaps you can talk the seller down a bit. The Monitor 7Bs should also have the Peerless tweeter (mine do). If you can afford it and can talk Seller(s) down a little, you may want to get both the 10As and 7Bs. Both are great speakers. As noted, the Monitor 7s have better imaging and the Monitor 10s have better bass. Some people prefer the Monitor 7s although personally I prefer the Monitor 10As overall. It is just a matter of taste and preference. Both are fantastic speakers and worth picking up.