The Imperial Gunner was the last figure I ever bought BITD, not even sure why I bought it as I'd already sold most of my original toys and only had a handful of figures left by then. I think it was because I thought he was a cool looking figure. This would have been around 1985, long after all my mates had left SW behind - it was computer games, bikes and clothes by then.
SW has never left me though.
The last time I saw SW for sale on the high street would have been in Woolworths in Newcastle-under-Lyme around 1986-87, there was practically a wall of boxed Jedi stuff, nothing rare but all dirt cheap.
When I was 16 and left school I got a part time job at Toys R Us, this allowed me to go out on Saturday night with my mates and get pissed, then get up at 6am on Sunday morning and walk around some of the local carboots. On the way back from one I walked past this shop in Burslem (around 1990):
In the window was a Jedi carded Death Star Droid with a price tag of 25p, and a handwritten sign saying 'more inside'. I went back the following day and filled a small box full of Jedi carded figures and displayed them in my room.
In the same town, there was a small, family run toy shop that mainly sold baby stuff and prams but had a small selection of random toys for older kids - it had been around for ages and the chap was closing down. I asked on the off chance there was any SW stuff and he told me to come back the following week.
I did and waiting for my was a shipping case full of Speeder bikes, a single mint ESB Palitoy Taun Taun and a handful of carded figures - mostly Tri Logo Han Hoths - price paid? £10.
I don't recall seeing much else for sale past 1992.