In my city (not the smallest one, like 650k people) there are I think 3 or 4 retail stores, and I think they will go bankrupt in next years.
First one is stuck in the early 90's, selling pots, transistors, passives. I guess the most sophisticated stuff you will ever get is Atmega8 (actually Atmel more or less dominates Polish MCU hobby scene). And the spin off of that shop flings mainly various audio/video cables, connectors, adapters, speakers and parts to make those, car audio components, that kind of stuff. I guess they will last as long as people do DIY audio, when they stop it they will go out of business. They also sell some 'consumer stuff' like fuses, adapters, lightbulbs, leds, battery chargers, etc.
Second one is located like 500m from Technical University campus, which kind of determines the range of stuff you can buy there. You can find a lot of stuff, but mainly basic parts, and mostly THT because students in beginner courses are afraid of smd and u cannot use those with breadboard. So yeah, they can get you pots, connectors, transistors, most of the popular 7400 and 4000 chips, AVRs, some range of 0805 smd, also basic (read:chinese) soldering stations, power suppliers, multimeters.
Third one is a little obscure business located in 2 small rooms in a basement of apartment block in rather bad neighborhood. They actually sell bulk quantities of passives (i mean u can actually get good price for a reel of caps or resistors). They are actually my favourite store, because while they often don;t have really generic popular stuff, they have an amazing selection of rare components and sub-assemblies. i assume those are mostly some surplus supplies, but that's the place to buy stuff which often even Farnell won't have (Digikey and Mouser are virtually non-existent in poland because of shipping costs and RS Poland does business only with companies, not private people). They also can get you some more "arcane" parts as long as you are willing to buy some minimum quantity (small, e.g. 5pcs of IC, 10pcs of some particular electrolytic cap value etc)
Fourth one actually deals in development tools. They distribute Chinese brand stuff, but give a warranty for them which is nice. Thy sell Rigol, UNI-T, Atten, Korad, Zhaoxin, PT, and accessories for all of those. They also sell universal programmers, development boards and breakout boards of their own design. Recently they started selling smd 0805 and 0603 passives aat amazing (for a hobbyist) prices per 100pcs, but so far they only have resistors.
What I'm trying to show is that you need to find your niche like audio, old-school stuff, students, cheap development supplies, industrial automation, audio/video replacement parts, embedded system stuffs (i mean more like Raspberry or BeagleBoard than simple PIC or AVR) or whatever.