Where I live now, the two options are Metal Pros and Metal Supermarket both targeting small businesses and prices are so so. What does help is asking what they have in offcuts, they often have something a little longer than needed but is less expensive than when you factor in the cutting fee.
Up until recently I was living in a large city with numerous recycling plants and that’s where I could get great prices, the trick was dropping by on a somewhat regular basis because the way it worked was that they had these roll around bins about 2 cubic meters, as the metal flowed in it would get dumped into the appropriate bin for the type of metal, once full it would be dumped in the back. Some days you show up and one of the local aircraft manufacturers just filled the bin with new off cuts: plate, rounds, block whatever. Basically you would pay ~ the recycle price this seemed to work out to about 1/4 the price from the actual suppliers.