Noticed prices up on lots of stuff at CRC/Wiggle, so they definitely feel they have an advantage even if it isn't "legally" a monopoly position
I think the Tredz business model includes selling stock they don't own yet which is good for their cash flow but does mean delivery can times vary wildly IME
One thing the box shifters can be good for is the odd, silly cheap bargain though - I got a pair of Orlieb Back Rollers last year for under £60, as did a couple of other folks at the bike charity I help out at - reckon someone didn't know some Ortliebs come as pairs and others as singles . . .