I have been buying and selling physical metals for years. There are 3 options for you:
1) go to your local jewelry store or buyer. They will try for a 15-20% under spot, but you can haggle most of them down to maybe 10% under, because they will re-sell it and get profit from the other end.
2) Take it to the closest pawn shop. They will give you closest to spot- maybe 5-7 % under, maybe right at spot.
3) These days if you have the time, E-Bay is where the big money is at. Not sure if it's preppers or just fear in general, but people are PAYING ( Not just asking) 60, 70, 80,%- or even double. Example: Valcambi silver combi-bars. These are 100 gram bars that can be broken into 1 gram bars, each stamped. Today, 1 gram of silver spot price is 78 cents, making the bar worth $78.00. Average sale price is $140-$150. 1 oz gold bars aren't too bad, at around $2150, but smaller denominations like grams, which are at around 65.50 spot today go for $80 +. The small denominations are getting more popular for preppers ( to use as currency) as well as small investors, and are being price accordingly.
Hope that helps...