Well I cant really say or speak for suppliers but if you took a look at a UK vendor you would get an idea.
SEMROIC SLS Hustler - cost (inc shipping) £40
Motor for above, heights and cost - cost doesnt include shipping which in the UK for the motors generally costs about £15 for a courier so if you order more/less it can have a big effect on final price. The price below is based on the cost of a pack of motors split down pro rata.
D12-3 350' (at a push) £4.60 per motor
D15-4 450' £7.00 per motor
E15-4 1,100' £9.50 per motor
F24-7 1,400' £10.50 per motor
That averages at about .9 pence per foot of altitude for tjose with a math mind. Above 1,400' I havent calculated because we all know that flying higher than that will cause the basic structre of the universe to crack and we'd all be swallowed up
"Reality is merely an illusion, albeit a very persistent one."