i remember that. i paid 9,99 €. it was summer. the RE190 v4 or v5 is not practical because it has only 8 MB ROM and 64 MB RAM.
latest update for v5 is Firmware-Version:
1.1.0 Build 250916 Rel.39444n (6985)
Hardwareversion:
RE190 5.0
it looks like the RE190 is a RE200 without LAN-Port.