cheap and cheery/cheerful

[Theseus]

cheap and cheerful (British informal)
costing little money but attractive, pleasant, or enjoyable.
--They specialise in cheap and cheerful package holidays to Spain and Portugal.
--Do you like your new kitchen units?
--Yes. They're cheap and cheery.:)

 

[Zazula]

φτηνά και καλά

 

[nickel]

We don't seem to have a slogan-like phrase with the kind of linguistic magic that would make it memorable (like the alliteration in the English phrase). The other one I can think of right now uses "... όλα και συμφέρει", e.g. «Τα κάνει όλα και συμφέρει», «Τα 'χει όλα και συμφέρει».