A: They are really different things, though of course they may represent the same underlying products
In most cases people have separate rental inventory and retail inventory.
- you have kit that you sell - brand new.
- and you also have kit that you rent - used items.
in which case you have two inventories really.
each with their own ID's. Retail over lightspeed, and Rental using BRM.
if you rent something and take money in Lightspeed all the transactions go through one bit of 'dummy inventory' on Lightspeed, your 11111111111 code
But some people operate one inventory which is simultaneously for sale and for rent.
This is fine, but you are then just representing the same stuff in two different places.
They have have the same ID's or not, it doesn't matter as long as you can physically identify a bike in each system:
|what||serial number||LS ID||BRM ID2|
|Trek 8.2FX medium||234524524552||1000003834||TRK23|