I am a UK buyer and these are the price bands I consider fair based on past deals -
Signature standard: ?1500-?2000 dependent on wood, leds etc (in 2005 I bought a AAA quilt maple MK with front laser leds for ?1500)
Signature Deluxe - ?2250-?3000 (paid ?2200 for a Brown Bass in 2005, and was happy to pay ?3k in 2006 to get back my coco stan sig deluxe with sII prep cavities, chrome hardware, 20th anni electronics, front and side leds)
Anything above signature level you would be crazy to pay UK prices - easier and cheaper to get a deal in the US and buy a plane ticket to go collect - have bought 3 used series basses this way on this very forum for less than signature prices in UK.
Damn I wish I kept those basses lol