Hi DFB,
The wheels can be worth a lot if they are like new but most are worn flat on the outside and or have cracks ,I still see lots
of mowers with good wheels way cheaper than what people ask for a set of used wheels.
There is a list of models here if you haven't already seen them
https://www.vintagemowers.net/Victa_Specials.phpWith the engine numbers the early ones were 1 to 360,000 roughly then they used letters like A ,AA, AAA, B. BB ,BBB,C,
D,with numbers after the letters
These are probably the easiest mowers to work on , set the float height , clean and adjust the points, set the timing ,
check the plug gap , clean the carby out ,buy carby gaskets ,fuel tap o rings on eBay.
PDF manual below to download.
Cheers
Max.