I used to sell wheelchair tyres via another website but unfortunately it turned out to be more trouble than it was worth.
The main problem is there are so many different sizes of wheelchair tyres, so many different tread options, tubed and tubeless options that it meant buying in any stock just wasn’t practical.
Another problem is that the wheelchair tyres sizes were just nominal and a US 24 x 1 could be a different size to a UK 24 x 1. This sometimes resulted in people ordering the wrong size.
Due to the fact they are cheap, there is very little mark up on wheelchair tyres and because they are a strange shape the postage on them isn’t cheap either.
The fimal straw was when my supllier (understandably) emposed a small handling fee of £10.00
What this meant was when someone was ordering a pair of wheelchair tyres for £25 it was costing over half as much again just for the handling and delivery charges.