Appraisal and donating a collection

[Tony Eros]

I'm looking to donate my vintage computer collection to a museum in
Delaware.  The museum is a 501(c)3 educational foundation, so theoretically
my donation will be tax-deductible.

>From what I'm reading though, it looks like I will need to get the
collection appraised in order to properly take advantage of the tax
benefits.

Has anyone on the list had experience in this area?  How do I go about
getting my collection valued?

Thanks!

-- Tony