I will do your appraisal for free.  We are trying to encourage wider adoption of this tax technique which can save significant taxes and encourage more coin usage.  The rules are surprising tricky  in this tax law area and even if you paid $600 you might have some problems in the future.  I'm new to this board so I'm not sure about the solicitation rules when offering free help.

You can contact me via our volunteer charity website.  My volunteer work is in interesting tax incentives for donors.  I have participated in many form 8283 donations.

http://www.pennsylvaniaeitc.org/contact-us.html 

The charity needs to receive your donation in a wallet or you don't need an appraisal as you would report a bitcoin capital gain and a cash donation.

Your tax article is interesting and thoughtful.  With the extreme increase in virtual currency  tax planning from diversifying investments out of virtual currency will avoid an extremely high tax bill.  The two conditions of significant unrealized gain and the possibility that virtual currency exchanges could begin 3rd party tax reporting to the IRS could result in large unexpected tax bills without proper tax planning occurring.

Here is an article about the IRS and bitcoin.

http://fortune.com/2017/03/19/irs-bitcoin-lawsuit/.

 Charitable gift annuity provide a similar opportunity for virtual currency tax avoidance.  They have advantages in that charities handle all the administration  and annual tax reporting.  Charitable gift annuities also place all the investment risk on the charity.  The donor does have to negotiate the best deal but the transaction can be much faster than a charitable remainder trust.  The donor does give up control at the time of the gift.

 Here is an article on charitable gift annuities.

 http://bitcointaxblog.weebly.com/bitcointax-blog