Sounds like a good deal to me. I bought my L3410 HST, folding ROPs, LA481 FEL with HD bucket, R1's, ballast in rear tires, 6' LandPride cutter, 6' LandPride rear blade for $20,000 back in November. So if I back out the FEL, cutter and blade it brings it down to around $15,000 or just a tad under. Are you going to add the FEL? You should be very happy with the 3410, mine has done everything I hoped for and much more.
I have a nice 886 w/ a FEL on it now (for sale)....if it doesn't sell, I won't put a FEL on the compact. Wondering if the L3410 would handle a 6 foot box blade to capacity? I pull it now w/ a 9N, but I have to constantly feather the load.
I have a L3010 GST and I've pulled my 72" Box Scraper easily. I have not had the scarifiers all the way down most of the time. I spun a little going up hill on some crush&run but all I did was kick in the 4WD and drop to 2ND gear and it took off. It was pulling a pretty full load too. You shouldn't have a problem with a 3410.