Up for sale is a complete set of the 1991 Kenner The Real Ghostbusters Ecto Glow series. 

I purchased these in the mid-90s through Ebay and stored them in a climate controlled, pet-free/smoke-free basement in a paper box for over 30 years.

These figures have held up well and were placed in acrylic cases just recently. 
The cases were purchased by Iain's Display Accessories and the case specifications are as follows:

Maximum Bubble Depth: 76mm (3 inches deep)
Access: Sliding Bottom Panel
Material: 3mm Acrylic Sheet (UV 96/97%+)

As this is a serious purchase, feel free to ask any questions regarding this set.

Shipping : Items will be placed in secure individual boxes and placed in a larger box.
Insurance, tracking, and signature of delivery will be added.

In time with the release of the new movie, these will make a wonderful set to have for any Ghostbusters fan!