I think the OM cameras were more popular in the UK then here in the States. They seldom show up on craigslist or at yard sales. KEH has a nice OM 3Ti for $1500. And since I live in New Hampshire there is no tax. It's been on their sight for about a year with the price steadily going down. However I doubt it will ever go down enough for me to make the purchase. As you pointed out, that's a lifetime of film, chemicals, paper, and some nice glass.
The OM 2n zanxion 72 suggests is worth a look at.