If there is noting special listed in the stats and the description doesn't give a hint that there is something unique about a piece of equipment, then a high value doesn't necessarily mean anything. There are relatively rare random attributes for items (such as the suffix 'of angels') which increase their value to merchants, but do not give any other bonus. This works best when you find such items and sell them.
An interesting find in the wastelands, worth 50,000 gold (I assume the 'silver' part is what bumped the price up);Silver Long Dagger Of Mater Warriors
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