Just came back from England two days ago and like you wanted to look for some interesting old tools. Reading was my home town way back and did have a large flea market area on Oxford St, west side of town coming out of Broad St. No idea if it is still there. In my extensive travels I found some family run tool stores but virtually no good old tools. One pair of Japanese chisels was overpriced.
Don’t forget when you order new from outside England you don’t pay the 17.5% sales tax included in their prices.
I would look on the local internet sales site such as Gumtree in your area for tool bargains.
You can do a lot with very little! You can do a little more with a lot!