This is an L series as such is a heavier and more HP 28 vs 21 than the B7500 so it depends on what you need it for. The price is not bad - maybe a tad high but it looks in nice shape and has low hours as well.
The L Series has a slightly higher center of gravity but is a workhorse. I had an older L Series with a BH before I got my B21 TLB and the B21 with HST and if you want manuerverability, ease of use, the HST is the best.
I think with the $3K lower price and 6 years newer, lower hrs, the B7500 is the better deal unless you need more tractor. With the price of the B you can likely upgrade the tractor in a few years and keep the implements and not lose any $.
This L2650 is not that great of a deal. I have a L3240 for sale, which is the current model tractor, with a loader, 4wd, shuttle, GST trans, R4's, 138hrs for only $2750 more. Plus mine has warranty until June 2010.