Looks like it was use to mix mud, and rolled around in the back of UK Phil P. truck for a year or two ,good luck with that one.
You have no idea, Bob....... it has just been used
! What it looks like matters a lot less than how it performs IMHO, and to keep stuff performing well you have to oil it, put it away in it's Systainer at the end of the day, secure the containers before setting off, etc. Loose tools in the back of a van
? Sure fire way of ending up in A&E (ER)
Looking at the photos, does the router look OK?
I will definitely be replacing the power plug at the end of cord (not shown) as it won’t last much longer.
Despite rich uncle Bob's comments it doesn't look too bad to me. Mainly seems to need a good clean with a slightly damp cloth and some detergent. I've a lot seen worse, believe me! First thing is to replace the plug, switch it on and see how/if it runs. If it runs what does it sound like? The main things which go on routers used in industry/trade are the carbon brushes, the top and bottom bearings, the power cord and the on-off switch. The brushes may well be found on eBay, bearings too, but either way the bearings are likely to be over the counter ones from a local engineering supplies shop (or ebay/'net). I'd certainly recommend doing the brushes. They're about AUS $8 a pop over here
(you should be able to find a parts retailer in Oz as it's a very popular make). As to the wrenches they are 21mm and 23mm respectively according to the parts listing - so obtainable with a bit of searching (the 23mm is a bit of an oddball size). Another thing I'd look at is the condition of the collet and it's reducer (which appears to be mounted). These should be free of rust and nice and shiny on the bearing surfaces.
Nice thing is this router is still being dold in some markets
(although no longer in production) so parts should be available. Here's a review
Good luck with your purchase