I switched my tubed wire wheels for tubeless a couple of years ago for exactly the reasons you described - far too many punctures.
I bought a set of black painted wires fitted with tubeless Vredestein Sprint Classics, MWS supplied them complete, fitted and balanced. I paid £1630 for 5 wheels and tyres, including fitting, balancing and delivery.
I never thought about asking MWS to take my old wheels in PX, I just sold them via TM.
