Best place to sell Oset Bikes?

[GotGas]

It might just be me but I'm having real difficulty selling my sons Oset 24 - literally zero interest. And I'm just about to try and sell my youngest's Oset 20 too 😳. Never had this before selling on Facebook marketplace or locally. So I'm looking for advice on best sales approach and where to list them as it seems they're possibly a bit niche? Normally I'd say this would suggest they're priced too high but I've advertised it slightly below others and it's in top condition. I'm obviously missing something. Crazy thing is that they're brilliant bikes for younger ones getting into the sport! Its most frustrating. 

I think an issue may be that it seems Oset is going though a bit of a problem patch since Triumph took over with after sales and spares taking a hit and it's putting people off. Although I can't say I've noticed any issues with eBay being a good source of parts (all the main trials suppliers are on there too). 

Any input gratefully received 🙂

Edited 3 hours ago by GotGas