£78 sounds good to me although I'd whip both off and respray myself but then I have a little bit of experience and good results of spray painting. As they are quite small they are excellent candidates for spraying yourself.
You need to prep them properly - sanding with fine wet and dry. Fill and marks, then sand again. Then paint in very thin coats (don't want drips etc). Lastly lacquer coating in fine coats again. Any blemishes between coats can be removed using fine wet and dry. Finally polish for perfect finish - autoglym super resin might do the job once the paint has hardened for a few days. Just take your time and don't rush any stage.
If you c*ck it all up, get it done for £78.
If you don't c*ck it up, then enjoy your work and be happy
Either way, be happy