Hi Valentin .
One Space Walk is sold 15000 and 12000 for an other .
Some pinballs are very sought after by EM collectors .
It's very rare to find them on sale as they are already booked for long .
You can find it for a good price in South America ( Brazil, Argentina , Chile, ...) or South Africa but most are wrecks .
For me, if you have found a SW with a nice backglass and playfield , make you happy, you only live once .
Good luck Valentin .