Chain and sprocket advice needed

[Orinoco]

I need to chain the chain and sprockets on my bike after almost 20,000 miles.  The problem is with what!  I've spotted two sets on Ebay, I think they are both the same grade and quality, but quite different price, could anyone offer any advice?

They are:
http://www.ebay.co.uk/itm/300679476872? ... 1611wt_698

and
http://www.ebay.co.uk/itm/220888987915? ... 454wt_1108

I think it might just be one's gold and hence cost more?

Help  

[TravellingStrom]

Both of those look real cheap, I need to get one when I come over.

For comparison, down here I would be paying GBP290 so I would not quibble about a few quid here and there

Those chains will be endless and you would need to remove the swingarm to install it or break the chain, obviously the last is easier

[hookie]

Either of these should be fine. Also suggest you have a look at this- http://www.ebay.co.uk/itm/260990659813?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649. The X ring chains aren't any stronger, they just use sealing rings with an X profile rather than the O profile rings in other chains. The X rings have four contact points and keep the internal grease in better and should last longer.  Just avoid the unbranded chains and make sure they supply a rivet type link and not a spring one.