You’re in business, a quite successful one by the sound of it. Therefore you know the difference between top line and bottom line.
I could easily sell my entire stock every month if I reduced my margins but I like to do the job right and stand by my customers if a fault occurs - that requires a lot of prep, proper servicing, paint, MOT, PDI, etc etc.
People often say to me, how much did you pay for that then? (Why the fuck do they think you should tell them that). It is irrelevant.
I often have £2k gross margin (hammer price to selling price). Less:
Buyers Fee, transport, fuel, MOT, service, valet, paint repair, mechanical repairs, VAT margin and Tax (my variable costs)
less
Rent, heating, lighting, phones, advertising, etc (my fixed costs).
In truth on a good car, good deal - I may make £600 pre tax (taking everything else in to consideration) and if I am lucky sell 8 a month.
See my VAT margin looks great but in reality, like everything. It’s not about what you bring in but what you pay out.