Or you could send someone a really poor picture of a sign you have found in a roof via text message (and possibly neglected to tell the owners). Let the dealer make the first offer and then load it up on ebay with their first bid as the starting price and offering punters free postage. You then neglect to tell the dealer that the sign is available online and wait for them to find out how rough it is with a much better photo than the one you sent them.
After ebay fees of 10%, Paypal of about 5% and the cost of postage, it makes you wonder how far off the mark £175 will have been. Or the second bid of £225? or the offer of being paid cash? etc etc.
http://www.ebay.co.uk/itm/180767819..._876wt_116
If you want a good deal off dealers you have to help them by sending good photos and being straight up. As professionals we survive by taking chances and every now and again (quite often through hard work though) we win enough to continue. I just about manage to do this by offering free advice around the clock and employing restorers and welders to add value to items like the sign linked to above.
I am sorry Kev is not satisfied with the free advice he got from me when posting on the site with the good images shown.
Best wishes
Al.