Thank you for contacting Mearto with your appraisal inquiry.

It is a beautiful Issey Miyake mens jacket. Such vintage designer clothes are being offered at auction on a regular basis.
The design of the jacket is very elegant and classic in the typical Issey Miyake style. The jacket appears to be in good condition which is important for potentiel buyers. There is a market for vintage clothes however the price tend to be much lower than the original retail price despite good condition and smart design. However, I believe that this jacket would attract the attention of both collectors and dealers if it came up for auction.
The estimate provided is for a well-advertised specialised online vintage clothes auction, where I believe the jacket has the best chance of realising its fullest potential. However, there is no measurement for the sentimental value you might attach to the Issey Miyake. Retail "asking prices" can be higher and vary.

Please let me know if you have any additional questions. I’m happy to help.
Thank you