Your tools are all coming to the united states. Here's the pattern.
* you used to be able to get lots of good stuff on the ground. There were a few specialty dealers who would charge the moon, but you would scoff at them because they were aiming at well heeled collectors
* wave one changes things - people start visiting car boot sales and your versions of flea markets and estate sales because they realize that they can fence the tools on ebay. specialty dealers continue to exist. Some have taken to ebay. (i believe this is the current wave). Picking is so efficient because people who have no interest in tools can just find a picture of what's being sold and look at sale price in the last three days. if the tool price is half of ebay or less, you have no chance of seeing it later in the day.
* wave 2, which is where we are in the states now, combined with wave 1 - not only do pickers get the stuff at boot sales before you can, but people who would've sold things at boot sales start opening up ebay pages instead with global shipping. To us in the state's, they are able to sell us tools at half of what we pay here. To you, they're selling tools at 12 times what you expected to find them at a boot sale.
Once in a great while with wave 2, you find a relatively lazy seller who just doesn't care, anyway. It becomes more and more common.
High priced specialty dealers continue to exist indefinitely because they pay little for their stock compared to what they charge, and they know more than you can find out with historical ebay sales. Their listing of common norris planes cleaned but with a small twist (perhaps a norris 2 with some gunmetal bits) for $2500+ continues to rankle the UK crowd.
From my standpoint here in the states, thanks for making English paring chisels available for a third of what dealers charged here!! A really nice sorby or ward paring chisel used to tend between $75 and $100 US. One chisel. We can still find them listed like that from time to time from an English seller, but some browsing on ebay will find them for a fraction of that.
This happened in the US long ago. The old haunts that had gobs of tools available now only have stuff that is priced higher than ebay (and very little of it) and heavy things of little value. Flea markets here often have pre-open hours for people who pay extra to get in (the cost is often too steep for the average person to bother, like $50 or $75 gate fee), or the dealers themselves now at the fleas are there less to sell their wares, and more to find the one or two folks who rent a booth to sell of their recently deceased parents' stuff. The result is that you may find a booth with a bunch of tools, but the tools of any value or condition that you'd want were gone two hours before the gate opened to the general public.
It's over!! Funeral time for boot buyers. You can always buy raw stock now and make your own tools. (hammer)