I have the basics almost done(sell and rebuy horses). Mod should be compatible with Immersive Horses, as long as the added horses are moved to the same faction on buying them and the dialouge with the stablemasters is not altered. First possible problem(other faction on buying) can be solved rather easily however the second would make it incompatible. EDIT: v1.0 is done and uploaded: http://www.nexusmods.com/skyrim/mods/77851/? You can sell vanilla horses (not special ones like shadowmere) You can rebuy the horses. Sadly, since it's immersion breaking, the sold horses move to their original stables (gonna work out a fix for that later) Note that in order to sell a horse, you must have it with you(right next to you) If anyone wants another feature in the mod, ask away, if it's reasonable i'll implement it. Please report any bugs you encounter.