Defender 90 Anyone help with a rough valuation?

I'm considering selling my 90 and buying a 110 so I would like to get a rough and sensible valuation for my 90 so I can work out the financial side of this. Spec list is as follows -

2002 Td5 90 Genuine CSW & LEZ Compliant
- 85k
- Two sets of keys & fobs
- 2 Previous Owners - I've had it for just over 3 years
- Partial service history
- Serviced every year with quality parts/genuine parts by myself
- Large folder with a receipt of literally everything I have bought for it plus all MOT and servicing documents
Solid chassis with no rust - Waxoyled 2 years ago
Safety Devices Half cage
Dynachip Remap - Tiny puffs of black smoke on revving but nothing when driving
Serck Full Size Intercooler
Terrafirma Silicone Hoses
HD Steel Rock Sliders
HD Steel Steering Guard
Steel Diff Guards
Terrafirma Medium Load Shocks & Springs
MOD Steel Snorkel with Safari Head - Fully Sealed
Nordglass Heated Windscreen + new seal
RDX Center Console with Carling Switches, 12v Socket, x2 USB, 3.5mm Aux
288w CREE LED Light Bar - Roof
108w CREE LED Light Bar - Bumper
x3 54w CREE LED Light Bars - Rear
Wipac Clear Headlights
Faux Alcantara Headlining’s – Not perfect but look very good and no sagging
Leather Interior Trim with Orange Stitch – Frequently auto glymed
Exmoor Trim Leather Cubby box with cushioned lid
Infinity 8" Speakers fitted inside custom made roof mounted speaker box
Phillips Under Seat Subwoofer – Fitted behind cubby on bulkhead
Forward Facing Rear Seats with 3 point Inertia Belts
Black CSW Interior Trim
OMP Sports Steering Wheel
Complete Dynamat/Fatmat Soundproofing throughout along with foam & rubber
Central Locking - Door lock key holes blanked - Rear door still on key
Blue Sea Aux Fuse Box – Behind passenger seat
Cooper Discoverer STT 265/85 Tyres plenty of tread
Half Rear Roof Rack
Bosal Decat
Terrafirma Straught Through
EGR Blank with boost gauge fitting
Boost gauge in place of clock – Reads 1psi out

Bad points -
Minor leak from PAS - Have to top it up a drop every 6 months or so
Paint is tatty in areas, especially around rubber seals
Fair few scratches but nothing that couldn’t be cleaned up
Typical LR leaks but nothing at all serious

New parts fitted last year all either genuine or same quality. Drives very smoothly, bundles of power, obviously been off roaded but always looked after. Pretty sure thats everything, however a few bits have been omitted from the list as I would likely be keeping them for the 110, such as the seats which will be replaced with standard/XS style LR ones.
Any ideas what its worth? Cash only please

I think you should sell it to me for £4000

If I were buying (which I'm not) I think a sensible starting price would be £7k, this will give you room to negotiate to around £6,500ish. Good luck with the sale