In looking at Beckett Price guides for 1991 Robin Ventura cards, you will see prices range from $0.10-.50. Now, sellability is an issue, as the print runs associated with cards from this time period would have way more available cards for sale than there are buyers.
That is a 1991 Donruss card. It is selling for about $1 on eBay.
Nothing... he is garbage
About $2
Less than 15 cents.
Less than 25 cents.
Less than 25 cents.
Less than 10 cents.
Less than 15 cents.
Less than 25 cents.
A 1990 Upper Deck Robin Ventura UER card number 21 has a book value of about .50 cents in near/mint -mint condition. Professionally graded cards will sell for more. Condition is important. Common flaws with baseball cards include: rounded edges, creases, off centered, and faded color. Any or all flaws will devalue the card significantly.
book value, probably about 5 to 10 cents... but try and sell it!
This common card is worth less than 10 cents.