yep it sounds a lot and is top end of what you'll pay.
remember paint isn't cheap depending on what you get it can be really dear. last time i bought a small tin of blue for a bike it was about £70 add on primer + base coat if it needs it and a lacquer and it all adds up to a couple of hundred.
if you arnt inclined to apply it yourself a small car repair shop can sometimes give a good deal they will have stuff left over from other jobs and it wont take a lot even a 33 litre tank aint that big.
or just buy some cheap aerosols i've seen some reasonable jobs with just them.