Whenever I think about my OCD and get concerned....I remind myself of this fellow and feel less anxious.

http://www.royaldevice.com/custom.htm

So far, my collections of bikes, computers, watches, tools, and flashlights are well constrained budget-wise. It's more of a space issue. I'm suddenly up to 10 bike frames, 5 pairs of road wheels, and 5 pairs of MTB wheels. It's hard to ignore a bargain. :-\

But some OCD-ers in other arenas can blow quite outrageous amounts of $ on stuff. It's all fine if one can afford it. It's sad to see when they actually can't and loved ones suffer and they go into financial hardship and ruin.

I can't speak for all BAS folks, but I feel so far it's a relatively small price to pay for the enjoyment. Mostly a cost of time and space.
As my fiance said, if it's not negatively impacting one's life, and it makes you happy, by all means.
There are a lot more expensive hobbies, and therapy is just as expensive.