Not sure about the US, but I went to Canada thinking that there might be some bargains to be had – their sales tax is lower, plus – well it seems 90% of the MTB brands are from Canada or Cali.
Asked our chalet guy where the best place to buy some forks from – he said “well, they’re not exactly Chain Reaction Prices but…” he was Canadian, seems they have all their stuff shipped from Ballyclare too.
I’ve seen some cheap bikes from shops in New York (Sis in Law lives there) but there prices don’t include state or federal taxes – with some you could have it shipped direct to the UK and save those, but you’d get hit with import duty – some would old ship to SiL but then you’d get hit by local taxes and probably import duty as well.
The only way I really saw any real savings was to fly to NYC with an old clunker in a bag, buy a bike there and pay the local taxes, then fly back claiming you’d taken it with you – all sorts of illegal and if you consider the cost of the flights it just didn’t make sense.