That Fox, with its F750 spec engine, should be a proper flying machine but I have to dispute that statement about its Galvanised chassis being some form of safeguard against rust. The chassis on Foxes, and that on some 1993 Robins is known for being a festering rotbox and yes, they were dipped but Reliant's approach to storing freshly finished chassis on the wet earth floor at Two Gates meant that the chassis from the bottom of the pile would already be well rusted before they went to be dipped, so unless the buyer got a Fox whose chassis was from the upper part of the pile, the layer of Zinc would be less use than an ashtray on a motorcycle thanks to a somewhat lackadaisical pickling process that couldn't bridge holes or deal with deep pitting.
Worth a look though, as that one is known to be a solid survivor and the F.I.R.E. is a good engine choice as the F750 club made a conversion kit to make the engine suitable for dropping directly into the race cars as well as anything else with a Reliant gearbox which, if fitted with decent quality detent balls & springs and better quality (MK2 Escort 1300 Sport-spec) layshaft bearings, will handle the extra torque without any trouble. Some folk fit the gearbox from a small Suzuki 4x4 to these things but the Reliant gearbox is capable of handling much more torque than even the best F750 engine can provide, it's all in how well a given box was built and who did the work.
Birthday you say?

Oh yes, I checked and so it is. Damn!
The Fiat truck is a very unusual sight. Rich, please buy it.