price
Hello mate
The price is basically what someone is willing to pay for it, but as already stated you could start off around the£550 - £575 ish mark and see what happens.
Also there would be a factures to bare in mind, Condition of the marker itself, what original stuff is included like the barrel backs and fronts/case/manual/keys etc.
I will however state that i have recently purchased a XSVSL74 1 of 2 for £450 all in .
Hope this helps .
Carl