@atlochowski: thank you, but I prefer other search engines.
I notice that most ebay sellers specify "unlocked" for Xperia devices, so that's OK then I guess.

Back to the AquaFish:

I feel that 65€ (plus shipping) for a used Intex AquaFish is not a very good price, what do folks think?
Also I think I should ask the guy about Frequency bands for 2/3/4G and telephony...