I haven't noticed price increases, but recently it seems that B&H has stopped selling (most) single rolls of 120. Need to buy a 5 pack now, even in store.
If it makes you feel better, I blew a roll of T-Max 120 the other day because I loaded it into the Hasselblad backwards (needs to run under the reels not over. Duh.).
Nothing like coming home all excited about a freshly shot roll and seeing clear film emerge from the tank... Argh. Live and learn.