Is this reel a good one...or is it an early Shimano that ran its course? Is $140.00 too for a never used, new in the box with all brochures and parts included?
Sorry, I have never fished it, but the cost seems rather high unless you are a collector of Shimano fishing equipment.
I had the chance of playing with a used Bantam Mag plus and I was impressed by its smoothness and ease of operation. For me the price is right for a reel in mint condition. If you plan to fish with it do a thorough service and change the drag washers with carbonfiber ones and grease them with Cal's or Shimano drag grease. Although is an old reel it can go toe to toe with the modern baitcasters.
I have a 251, the LH version. I don't remember what I paid for it new in the late 1980's, but I'm sure it was quite a bit less than $100. It is the only baitcaster I've ever used so I can't compare it to anything else, but I like it.
brand new, in the box, original bill of sale, never spooled? ok, $140. otherwise, no. :-\
If you are buying it for a collection or display, then it's fine.
If you intend to fish with it, then consider a newer model Shimano that has more modern technology, is smoother, and will last a bit longer