small orders expensive and an obvious price difference between colour/BW 1/2 sided
best just to ask for quotes
i use Prontaprint but only for paper flyers/posters 1 sided, my flyers are printed 8 per A3 sheet and I cut them on a guillotine myself (so about 1p each, BW)
Prontaprint
links here also
Poster printing...
Jamie posted this co. in above thread - heres link for flyers
https://www.whitesparkpromotions.com.../350gsm-Flyers
and this is new
Iceberg Arts