If a 25 year old was selling the Purdey pair & the Perazzi for such a low price I would be suspicious that the guns were stolen & it wouldn't matter if he was black, white or a green man from the planet Mars.

People who buy firearms & other items at a small fraction of the market value from unknown sellers are supporting the high number of home burglaries we have in the USA. The old saying "if it's too good to be true it usually is" applies here & I think the buyer has a responsibility to do some basic investigation at the minimum. If everything checks out then you can do what ever you can live with depending on the situation.