As above.
Very basic mechanical spyder clone
You will be able to buy o-rings, and perhaps a spyder spring set
It will shoot paintballs and that's it
Go through the forum for new players advice
Also - where did you find this, I would hazard a guess from a U.S. Website, Amazon etc
Don't do it - use a UK supplier, the $ to £ price makes us look worse off but add postage, import duty (as long as it'a not so cheap as to be too low for charges) and time waiting for it