Brand Value can be either BV5 or BV4, depending on you certainty that they were made by Rekord and can be shown to be catalog items. BV5 is for completely unknown maker and BV4 is for little known or makers with a low quality stigma; not just having sold some lower quality guns, but strongly associated with lower quality guns.
Best work BLE's are Original Quality grade five, OQ5. Sounds like they would fit between the description of "slight use" = CC2 and "significant use" = CC3; say CC2.5. 16 bores have been bringing about a 2X premium recently for game guns, but I'm not sure it would apply in this case.
BV5-OQ5-CC2.5 X2 = $1850 per gun ($3700 for the pair). That sounds low for what you describe. BV4-OQ5-CC2.5 X2 = $3700/gun ($7400 for the pair). That sounds high, maybe. $5,000 for the pair might be about right or in the ball park.
This pair should go home with someone for about $4,000 BV3-OQ6-CC4 = $3500 for the pair.
http://auctions.holtandcompany.co.uk/asp...0&saletype=This pair may be overpriced in the auction estimate or will get a bit of a premium for being moder.. BV3-OQ6-CC2.25 = $6,000 for the pair. These are modern guns and are stretching the age envelope of my system.
http://auctions.holtandcompany.co.uk/asp...8&saletype=On the lower end, these would be BV3-OQ7-CC3.5 = $2850 for the pair.
http://auctions.holtandcompany.co.uk/asp...3&saletype=