Antique (?) Tibetian Thangka Mandala Painted Framed Estate Fresh

Description

Good afternoon from Congers, NY.  I'm well out of my depth in this item, but I was in the right place at the right time so I took a shot.  If you have any questions not addressed by me here, I'm happy to clarify.  Please see the photos as I believe they are more useful than my verbal description.  Happy bidding!
An antique (I believe at least 100 years old) Thangka painting of a Mandala.  It appears to be watercolor (?) on paper (?) or some other format.  It is amazingly intricate work.  The overall framed size is 18" tall x 16" wide.  The framed center part (sight size) is 13.5" x 11.25".  The center circle has a diameter of 10" to the outer edges.
Amazingly detailed painting.  Look at the closeups I have provided.  I purchased this off the wall of a local estate from an estate sale.  I have no information regarding provenance.  The frame is a little "shabby", but I think it suits the piece; in any event if you can live with the frame the art is ready to hang.
Happy to answer questions, please make the questions intelligible to a complete Tibetan antiques neophyte.  If you have photo requests, please be as specific as possible about what you want to see.
Offered for sale at 9.76. I have some room, please feel free to make an offer.  I am charging large Flat Rate Priority shipping on this, if the shipping exceeds the charged amount, I will absorb the overcharge.  If shipping is less than the charged amount, I will send a pro rata refund.
The item will be carefully, skillfully packaged and shipped via USPS Priority Mail.  I will pay for insurance for full value of the item; I will also pay for any additional domestic shipping charges not indicated here or shipping overages.  You may/will need to sign for the item when it arrives.  Most items ship same day as payment is received, if not same day next day.  Everything ships with a tracking number.  I do not have any control over you paying sales tax; eBay determines all sales tax.