I saw this and wondered if there would be much retro in there. It’s an area I’ve lived close to as a yoof and to be honest don’t remember the shop from back then possibly it was more road stuff so didn’t interest a teenage bmx/mtber. In Grantham the shop to go to was Cyclesport UK on London Road (long closed), several floors of goodness, seem to remember top level BMX right at the top of the building.
I still don’t live too far from this and was thinking inner tubes and workshop spares if they are the right price would be worth going over and collecting. When you look at some of the lots there is lots of value in them though looks like entry level in terms of the boxed Shimano stuff, good honest bike repair shop stuff. The tools/drawers etc while there’s a bit of the hoarder/hunter-gatherer that makes me want to have a bid, the rational side says how much stuff do I need!