Can anyone help me with an appraisal regarding these two banknotes? The difference between them is a signature, but I'm interested in their approximate value. Thank you.
Yours is a Soviet issue since the prefix is Г. They seem to be quite common even in higher grades. The rather sharp middle folds mean that they're worth a few dollars each.
Neither of the notes you have are particularly rare. Each series, in your case “ГД” and “БЕ”, had 200 000 notes printed. Like stated in the comments of the Numista page and by @Camerinvs, yours were issued by the RSFSR, the more common issuer.