Nice bowl, you are perfectly right -- usually described as Tutti Frutti.
Similar designs have been made by several makers, though yours looks like the ones usually attributed to AVEM.
And btw, Dino Martens has nothing to do with this design, even though you will find this info everywhere on the web

We don't like to give valuations here on the board, far too subjective.
If you search for completed sales of similar pieces on ebay, you may get an idea of how much to ask for it.
Michael