The usual problems re posting photos are that they are either in the wrong format or too large in data terms. Try putting one into an online programme like picresize and reduce the size to below 300kb, at the same time putting it into png format. Save and then try posting. That should do it. If it works you can do the rest likewise. Good luck.
P.S. I see @Lovemyguitar got there before me.
In respect of prices; most guitars of this age seem to cost between 40 and 60% of the price of the luthier's current similar models. Much depends on condition and desirability of course. Stafford Guitars has a new one for just short of £4,000 when vat is taken into account.