I was wondering how I could help the Ukrainian war effort. Sending money to charities was a possibility, but I wanted to participate in the actual war effort. Then it dawned on me that I could sell Ukrainian Postage stamps, purchased directly from the Ukrainian Postal Service.  The funds received would go directly to the Government of Ukraine for use as they deemed most appropriate.  All profits will go right back into buying more stamps from Ukrposhta. 

To date, we provided the Government of Ukraine with $15,889.28 for their effort.  The assistance of my past and future customers in helping me with this effort is greatly appreciated.  Please tell your relatives, friends, and coworkers of my listings.  Again, all profit on the Ukrainian stamps I sell will go right to the Ukrainian Postal Service for use by the Government of Ukraine as they see fit. 

I do combine S&H for multiple items purchased by the same bidder. Just wait for my combined invoice before paying.

The sheet is described as follows on the Ukrposhta website:
 

Medzhibiz Castle is a monument of fortification architecture of the 14th-19th centuries. The name comes from the location near the confluence of the South Bug and Buzhok rivers. Medzhibyzh was first mentioned in the Ipatiev Chronicle in 1146. In the 13th century. Medzhibizh belonged to the Bolokhiv land, but in 1255 Prince Danylo Romanovych annexed it to the Principality of Galicia. Mezhybyzh Fortress was declared an architectural monument in 1963. In 2001, the State Historical and Cultural Reserve "Mezhybyzh" was created. Olesky Castle is a monument of palace and fortification architecture of the 14th–18th centuries. The first written mention of it was recorded in historical sources in 1326. However, the earliest fortifications on the hill, which advantageously dominates the area in the floodplain of the Libertsia River, were built as early as the 13th century, during the time of the disintegration of Kyivan Rus into separate principalities. It is likely that the first stone castle was built by one of the sons of the Galician-Volyn prince Yury Lvovych - Lev or Andriy. Since 1975, a museum has been opened in Oleskyi Castle.