This is literally a once-in-a-lifetime chance to acquire a mind-blowing collection of electric keyboard instruments from the 50s to the 80s. They were collected between c.1990 and 2015 by a Dutch collector with an insatiable desire to seek out the most obscure and interesting old electronic keyboards. The bad news is that they have been stored in non-ideal surroundings, impossible to access to check or photograph.
The good news is that within the list of c. 160 instruments there are many of the absolute gems of electronic music history. There is undoubtedly enough here to create a serious museum of early electronic instruments, possibly a world-beating one.
You will need to organise sympathetic (preferably expert) collection of all items to your location - a sizeable space will probably be needed for triage and assessment. You will also need to accept that although the vast majority of the instruments were bought in working order, they have not been serviced since, and it is likely that many will need expert servicing. All will probably need cleaning and/or minor restoration, too. (One important point is that unlike many more recent instruments they don't use batteries, and so the damage infamously caused to many synths with memories in storage is obviated.)
There are some of the rarest and most fascinating instruments, but also a great chance to compare multiple examples of particular technology - a task that could otherwise take many years to accumulate the necessary items.
Rare classics such as three Multimonicas, two Chilton Talentmakers, four Optigans, two Vako Orchestrons, Jenny Ondioline, Tuttivox, Combichord, Pianoline, Ondiola, Wurlitzer Sideman, etc etc ....
Multiple versions of the same basic technology to contrast and compare - like 15x piano-attachment keyboards, 19x string machines, 40x combo organs...
Please see the photo pages (1-5) for the owner's list. Because of the circumstances it is not guaranteed to be 100% accurate, but it is as close to exact as he can remember.
With about thirty or forty exceptions, many of these instruments can sometimes be found for very reasonable prices by searching in small ads, in local auctions and on VEMIA, eBay etc - but the problem is always the time involved in searching for them, and the cost and risk of transport. To have them all from one seller is a huge advantage.
Plus the really rare ones (obviously the most interesting) are another story again. Try finding a Tuttivox, Vox Continental Baroque, Electronium Pi, Ondioline, Combichord, or multiple Multimonicas, Clavisets, Canary S3s, Orchestrons, Talentmakers and Optigans etc etc locally.
The whole collection is sold AS IS, AS IT STANDS, with no guarantee of exact accuracy of the list. The owner has never sold any of his purchases, so everything listed should in all likelihood be present, but exactness or completeness are not guaranteed.
Access for removal will need liaison with the seller, and undoubtedly need a large tail-lift vehicle, trolleys, manpower, careful packing, etc.. It might be that everything could be packed in a full-sized container for worldwide shipping (it could well need two containers - only a guess).