Any idea of the value [opgelost]

Value of what?

Im sorry for some reason my pics didnt upload in the original post

follow this procedure please: https://en.numista.com/forum/topic71935.html

There is no price guide for ancient coins such as price guides for modern. Best you can do is look at past auctions and calculate a median price from those. After a quick search I found two sold examples, one for 210$ and another for 280$. You can also find examples being currently sold on auction houses, ma-shops for 355 euro, romanorum for 600 AUD, cgbfr for 650 euro. These are asking prices, not sold prices, and it's questionable if they will ever sell.

As you can see prices are all over the place ranging from 210$ to 650 euro (around 750$). In my opinion a realistic price for which the coin would sell is between 200$ and 300$. Keep in mind this is a commonly counterfeited coin and a plain piece of paper won't be enough to sell it at those prices, you'll need a declaration of authenticity from a reputable source. Judging from the photos alone I cannot tell if the coin is real or not.

Have a nice day for all collectors.
Easy to look for ideas about a coin, the internet is full of them. I personally have idea of the value however, with a coin that is sold regularly, this is perhaps not a problem even overseas.
Rather, as already mentioned, the question of authenticity and guarantee of sales and insurance, etc. . Here I give for sale points of sale and prices.

https://www.google.com/search?q=tetradrachma+seleukid+antiochus+vii+sidetes+138-129+AR+sear+7092&rlz=1C1NHXL_csCZ927CZ927&sxsrf=ALeKk02lW5uwTTRANto5-187Av_QKyWoEw:1617116106624&source=lnms&tbm=isch&sa=X&ved=2ahUKEwj0xuH4otjvAhWK2aQKHQLrDhYQ_AUoAXoECAEQAw&biw=1093&bih=500

https://www.arscoin.com/product/seleukid-kingdom-antiochos-vii-euergetes-138-129-b-c-ar-tetradrachm/
https://www.amazon.com/138-129-Seleucid-Antiochus-Tetradrachm-Extremely/dp/B07DYHZHG2


Ivan

thank you for the great response, much appreciated