Yes, the P67 is a real bargain. I bought all of my P67 bodies, finders and lenses used also. Very easy to find mint condition P67 gear at very reasonable prices....so I think you may be tempted by another lens or two soon! :-) Although, I'll have to say the 105 is very nice and I used it quite alot for several years.
I mostly use Gitzo and Berlebach tripods, but I do have a few Bogens that would be ok for the P67...but I'm not much into ball heads.
By the way....love your photos taken with the Hasselblad too! We shoot with some of the same gear (501CM, 553ELX and 503CWD here).
Keep those photos coming!
Eagle River, Alaska