Don't think so (since customs/VAT seem to be already included). If you fear 512MB would be too low and get NanoPi's at a local shop maybe choosing one of the larger models to be combined with a JMS578 equipped USB enclosure is a better idea?
RPi 3 B+ is a pretty bad choice due to USB contention issues, Gigabit Ethernet problems (you need a switch with flow-control active otherwise performance totally sucks) and with a recent 'firmware' upgrade they also slowed down all RPi 3 B+ out there to masquerade a QC problem they had on a very small fraction of boards from the first batch (other vendors refund, those arrogant RPi folks think it's better to slow down the devices of all their users out there without even mentioning this anywhere, it needed public complaints to get this behaviour documented somewhere).
Still they do not fix their documentation and in case someone mentions this posts get deleted and the poster banned. Everything as usual:
raspberrypi.org/forums/viewtopic.php?f=63&t=219662 -- not there any more since they censored again. Archived here: archive.fo/UW2wq