There are some very disturbing mails going round where someone claims to be a collector wanting to buy your art. He even lets you know the budget he is working from. You are then requested to send a price list for the items he is interested in.
Now I have read somewhere that this “too good to be true” offer is perhaps someone wanting to trick you. There are various ways in which this can be achieved.
He may ask you to send a painting in return for a cheque or a credit card transaction. He may even transfer more money than the price of the painting. Then claiming to have made a mistake he would ask you to return the amount overpaid. Once you have done that you may find that the cheque has bounced or the money transfer has not gone through. So you will have lost the painting and the money you have transferred back.
Sometimes you may even sell two paintings to the same buyer. The procedure would than be much the same as above. You will be asked to return the money for the second painting which the buyer ordered by mistake. Once he has got your money you may not see any of his money nor will you see your painting again. However, you might find it being auctioned on ebay.