I can see spending up to about $250 on good mics. I like the idea of having an assortment with which to experiment with, and having enough to mic rooms, individual instruments, and secretly micing various audience folk to bring out various reactions (the latest being, "God Bless Old Men!"... whatever that means).
The OM-6s we rented were quoted to us (used) for $165 each. So, instead of paying for the rental (which could approach that figure, given how we've "forgotten" to return them for the last three weeks), we'll just buy the damn things.
Happy with' em. Next? NT-2s, probably. Or might try and buy RE20 used from work.