In my experience some UK online tobacconists will hold back bags of bulk Germains to be shared around regular customers thats how I usually get my supply.It makes commercial sense to keep regular customers happy.The stores are fully aware what happens to the large bags they sell and they don't make any extra money out of that.I don't blame them as they're a business. If they can get that sort of price from China then they'd be mad to sell it for less in the UK. Even at that price the popular stuff like Brown Flake and Medium Flake sells out quickly.
Some of the other UK tobacconists are selling it for a more reasonable £22 a tin but the stuff is rarely in stock and when it is it sells out in double quick time.
Luckily, some of the tobacconists have an alert system you can sign up for to be notified when a particular blend comes into stock. That's how I got my hands on 3 tins each of Germain's Brown Flake and Medium Flake. You just have to keep an eye on your email for the alerts.
Germain's is expensive and a bit of a pain in the arse to find but in my opinion it's worth it.
Luckily there are no such problems with Samuel Gawith/Gawith Hoggarth. Their stuff is normally in stock at most places.
I also believe that Germains are the innocent party in the price hikes that are going on.