a range of saddles to test fit... specifically from different brands.
Cover your arse but requiring a $100~ deposit (cost of saddle)... which can then be deduced as store credit if buyer doesnt like... avoids stupid Chinese jews like me from trying and buying else were
would also be awesome if you had a 'walk-in' workshop... ie $20 to walk in and use ANYTHING. Ie headset press, wheel truing stand etc... (not sure how insurance for that goes)
Prices will be key.... stock regular stuff.. like decent chains, mechs (XT), shifters (XT lever stuff), cables. Fork seals and oils. Lubes , greases etc
Spoke to a mate whos in the game... apparently kids bikes have the big margins, and quicker set up/turn around.... maybe pump those out?
OHHHH and you HAVE TO do an online store !! Super quick postage and range is key!
If you cut overheads and open an online store... I'd happily pay abit extra for parts that will arrive within 2-3days.
not saying you need to stock a brake lever for a set of saint brakes, or a crown race for a cane creek 40 headset..... but have a decent range of hydraulic hoses, brake levers, shifters, callipers, pedals, chains, cassettes..... standard stuff, consumables etc.