Gold coin

Hello everyone,
I own a 2019 Romania 500 Lei gold proof coin issued for the Apostolic Journey of Pope Francis to Romania.
Specifications:

• 1 oz gold (.999)
• Proof quality
• Mintage: 500 pieces
• Complete original box and certificate

I am trying to estimate its current market value and whether grading through NGC/PCGS would be worthwhile before selling.
Any opinions or previous auction references would be greatly appreciated.

Please don’t post the same question twice.

https://en.numista.com/forum/topic176855.html 

Naturally, the value is very directly related to the gold price. There could be up to about 5% premium based on the lower mintage and the interest in Roman Catholic (+ Romania) material of a potential buyer. That kind of buyer probably does not desire or care about the slab, the coin is in a capsule, nor the fact that it's a 69/70 grade. Additionally, it separates the coin from the presentation box, which may appeal to many people for such a coin. Sadly, this type of material is what is ending up in the melting pot. It's bullion in a handsome and different form, which some gold hoarders appreciate.

Modern “made for collectors” stuff usually carries little to no premium, especially if made out of expensive material like gold and/or from obscure places or depicting designs only interesting to a fringe audience. This is true the longer they are on the market, usually sold for a high price at the beginning and resold at a loss at each further sale [I try to be the 3rd or 4th buyer for my modern NCLT coins from Japan were I can often acquire them for a third or fifth of the original sales price].

They are also often artificially scarce with low mintages but “rarity” in isolation doesn't warrant a higher value.