Does £750 seem like a good price for a tailgate from a caravelle with all the inner parts, rear trim panel, etc?
If it’s mint and in the colour you want, it’s reasonable in terms of price - on top of that I’d estimate you’d then spend anything between £150-£400 on a tailgate bumper, £60 or so on the D-pillar covers, £150-£350 on taillamps, £30 on gas struts, £150 on the Vagnostics kit and £150 on wiring/coding. So it adds up.
I paid £500 for my tailgate but sold my doors for £380, paid £330 for tail lamps and a threshold but sold my lamps for £85, paid £300 (+ £125 paint) for a new bumper (with sensor mounts) and sold mine for £100. The internals were roughly £400+ (I lost count after returning some bits and replacing some bits) paid something like £60 for the D pillar covers and £30 for a new bumper protector.
So it all adds up.
To put it in to perspective -
I’ve been asked why i didn’t buy a tailgate van to start with; when i was looking, our can came along at a good price and I would most likely have paid £1000 or so more for a tailgate model -
so whilst it’s taken me time to do, it’s almost balanced out cost-wise.
Prices have come down now so you’ll probably be able to do it for less than I did.
A replete tailgate panel with internals will save you time, but they are probably aimed at the ‘crash-replacement’ market hence the cost.
So if I were in your shoes (and one had come up whilst I was looking) I’d buy a tailgate from a Cali so it included the chairs and the rear roller-blind (T5 Cotswold parts had one for sale).
Your other post mentions wiring concerns - if you are talking it wiring it yourself, the forum can supply you with wiring diagrams. There is a cable which needs running back to the BCM but other than that you simply plug the loom in to the corresponding components.
And if you pay someone to code it for you, trust me, you won’t have any concerns then: it took Edd a couple of hours to do what appeared to be a fairly straight forward job in terms of fitting - he pinned out my tailgate loom where it comes in to the van, removed the nearside poptop fascia panel, ran a cable along that and down the A-pillar and plugged it in to the BCM - he made no mess and the fascia board went back on just like it did when it had the roof fitted.