How much is bike worth? And more...

[The Original Muzza]

I'm going to sell my 125 when the insurance runs out at the start of May, as there is no point insuring it anymore and I never ride it in favour of my 600.
It is a GZ125 with 10xxx miles on it, 55Plate with no panel or tank damage. Many fixing are rusted, and the exhaust is crap. It had scuffs and melted boot on it, so I sanded it down and painted it matt black, then I didn't like the look of it, so I sanded it down again. Has heat damage on down pipe, rust and pinhole. Will bandage the hole before MOT. SO... how much you reckon it would be worth?

Also fancy buying a larger displacement cruiser. Looking at a couple of Yammy XVs at local breaker/dealer. 1 XVS650 dragstar P reg beautiful condition for £1750, but in faggy baby blue colour(23k miles on it). Alternatively XV535 virago H reg £1300 in red (undisclosed mileage on website).
Both would be around 200-250 for me to insure Fully comp.
As I am on 33bhp for a good while yet, was wondering what the chances are these machines have naturally degraded to <33bhp, 535 was 38bhp new, and 650 was 40.

Any help will be much appreciated.
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Current Bikes: Husqvarna Svartpilen 401 (2020)
Former Bikes: Honda MSX125 (2014), BMW Funduro (1996), Honda VT500 (1983), Yamaha FZR250 (1989), Suzuki GZ125 Marauder(2005),:Triumph TT600 (2002) (stolen)
From then on, I and the bicycle feelings deeper.