What are the values of original Roosevelt Sykes or Jimmy Yancey 1940s 78 rpm blues records?

Roosevelt Sykes 78 rpm's which are listed are as follows.
Recorded in 1950 on the Jazz Collector label L40
"Three Six and Nine/We can sell that Thing".In Mint condition it is worth 拢12,in Excellent condition 拢10,Very Good 拢6,Good 拢3-50.
Recorded in 1956 on the Vogue label V2389
"Fine and Brown/Too Hot to Hold" is worth 拢30-00 in Mint condition,拢25 Excellent,拢15 Very Good and 拢9 Good.
Recorded in 1956 on the Vogue label V2393
"Walking this Boogie/Security Blue" is also worth 拢30 in Mint condition.
As for Jimmy Yancey no 78 rpm's are listed but as they both recorded in the 1950's I would imagine that they are worth about the same.

Don't know off-hand ...

Go to ebay, type in what it is under COMPLETED listings, and if any have sold you will get an idea what people would be willing to pay.

The book value of old records is impressive...those 78s may be worth $50 each. However, when you try to find a buyer who will pay that price, it is very difficult.
Collect records for your own enjoyment. When you are filling out a personal assets sheet, you can list your record collection as an asset, but if you actually tried to sell it you would probably find that nobody wants to buy the book value.

dont sell yet the markets are down give it time and you may get the asking price.

About 35 dollars if they are in good condition