Hello - I think you need to approach this question differently...and start with the budget..otherwise the conversation will go round in circles. Without wishing to offend you, am I right in thinking you are not already an experienced cruiser? (it is unusual to put the question the way you have). For instance you simply do not have space in a 32 for your list, especially the 'freezer' and tankage (32 has <75 lts fuel as standard). Already your small cockpit locker will be compromised by the heater and boiler, and you need that storage for the dinghy (which in davits causes lots of windage so sometimes needs storing in the locker) and other essentials. The 32 does not have a large enough heads for a shower, but if you will be sailing colder climates a shower is less important (wet wipes or a sponge are a real alternative to an inside shower on a small boat for experienced sailors, otherwise at this size it's not an ocean-going Ovni but a plastic boat designed as a maison secondaire (holiday home) like the Beneteaus that you need). But that's another topic. Moreover if cruising remote areas you won't want to be wasting fresh water on showers! 200 litres is not much - especially if you have a wasteful pressurised system. Finally, 32 does not have a portique (radar arch) as standard although a stainless gantry is often added. I know of one 32 with an Alubat arch retro-fitted but it was a very complicated and expensive operation to cut down the factory arch designed for a 345.
Older boats do not have factory-fitted insulation (what do you mean by 'completely' ? Insulation is really aimed at reducing condensation not improving temperature on a wood-lined boat like the Ovni (insulation is yet another topic). They do though have treadmaster-style non-slip which is a good insulator against condensation. So you need at least a 345 or much older 35/36. 345s are available for less than you quote (reflected in condition, mainly paint). But they are not as good sailers as the Briand designs. If you can afford a 365 (modern Lombard design equal in volume to 385) go for it. if not you still need bigger than 32/33 (why do you want so small?) so go for an older 36 or 345. Ovni vs. ANOther (eg Reinke) prices I can explain in another reply.
OVNI 385 No.84 (2004) - Sud Bretagne
ex OVNI 30 (1989)