One twenty film is a beautiful thing. Both Josh and I shoot with medium format cameras but with the massive drop in prices of high quality digital cameras (Canon 5D Mark II for $2699), the prices of very high quality medium format cameras are dropping as well.
Now I will say that I think medium format film will be here for a very long time and have no worries about whether or not I will be able to buy it. Since I have a darkroom in my home, film processing and printing are somewhat easy for me.
Just out of curiousity, I started checking ebay for other medium format gear and frankly, I was quite surprised how low some of the prices are. So I've made a simple little list below so that you can see what kits (body, lens, back, viewfinder) are going for.
Holgas for $40
Yashica D for $150
Bronica ETRS for $350
Pentax 645 for $350
Pentax 67 for $400
Fuji GA645 for $500
Rolleiflex 3.5 for $600
Mamiya RB67 for $600
Mamiya 645 Pro TL for $600
Mamiya 645 AF for $650
Hasselblad 500cm for $750
For $500, you could do really well if you are patient and know exactly what you are looking for what things should sell for. For $750 to $1000, your options are even better with kits that include more than one lens or other accessories. I just took a small sampling of ebay so that you could have an idea. If you are sticking with film until your end (not films end), than $1500 to $2500 will buy a whole lot of high end equipment.
Mamiya 7II with 80mm lens for $1600
Hasselblad 501cm with 80mm lens for $1600
Pentax 67II with AE prism and 105mm lens for $1600
You get the idea. Then buy a decent scanner for $1000 and you are getting better results than some of the semi-pro digital cameras that are out today.