Bike B shows as "delisted" now. Bike "A" is suspect.
Seller claims bike was "restored" 2 years ago, and he's owned it for 3. If so, then theres some damage to that bike he put on it. Chain guard is cracked, side cover (L) is damaged, and theres apparent rust on the rims, and other places. Frame is scratched in a number of places, indicating the bike has at least been knocked over, but not badly...
Screws on side covers are stock, and seem unmolested; hard to do if you "restore" one of these. So I question his claim about restored.
At that mileage, with the condition of the bike, I'd be somewhere between $1,100 and $1,400 maximum to buy that bike. It would have to have a clear, valid title (seems to have a current Reg plate), and the bike better start, idle and rev for that money. Paint on tank is not stock. Looks poorly applied in the pictures.
If you're out to customize, these stock issues won't matter. But knowing what is/isnt been done should factor into your project budget. Not sure you can buy this bike for the right price from a distance, but thats my input-
Good luck and hope it turns out well for you!