@JONNIE
You have a very jaundiced view of running a small business selling pre-owned B&O or any other small business. How do you know that this seller is making "healthy profits". By the time he has paid all his dues, he will be lucky if he has enough left to fill his bath, never mind a swimming pool or two.
Ebay fees, paypal fees, 20% of margin to VAT man, income tax, national insurance, bank interest and fees, motoring costs to collect stock, wages etc, etc. are just some of the outgoings before making a "profit".