You have been out for the day doing some pirating. Your hold is full with, say, some Stem Bolts. Pretty worthless bit of loot but as the game is you can fly to any base and sell them for face value (as listed in goods.ini). This is not real.

If you set the market_commodities.ini file to buy them at zero then they will not be visible at the base you are docked, either in your hold or with the commodity dealer. Hold of invisible goods might not be wanted.

Best bet is to set the market_commodities.ini file to buy them for $1. They then appear in your hold and you can't get much of an income from them.

In markets_commodities.ini you will need to set the price modifier to an appropriate value so that the price appears at $1.

MarketGood = commodity_boron, 0, -1, 0, 0, 1, price_modifier

The following equation will find the appropriate price modifier where the face value is the price listed in goods.ini.

price_modifier = 1 / face_value + 0.000001

Below is a list of all the original commodities with the appropriate price modifier. To use the list copy it to a [BaseGood entry in market_commodities.ini and put back the original lines that were already there. Be sure you have no duplicate commodities. Selling loot for a good price just got harder.

MarketGood = commodity_boron, 0, -1, 0, 0, 1, 0.008334
MarketGood = commodity_beryllium, 0, -1, 0, 0, 1, 0.008334
MarketGood = commodity_gold, 0, -1, 0, 0, 1, 0.002354
MarketGood = commodity_cobalt, 0, -1, 0, 0, 1, 0.008334
MarketGood = commodity_silver, 0, -1, 0, 0, 1, 0.003572
MarketGood = commodity_toxic_waste, 0, -1, 0, 0, 1, 0.500001
MarketGood = commodity_scrap_metal, 0, -1, 0, 0, 1, 0.200001
MarketGood = commodity_hydrocarbons, 0, -1, 0, 0, 1, 0.025001
MarketGood = commodity_niobium, 0, -1, 0, 0, 1, 0.003126
MarketGood = commodity_copper, 0, -1, 0, 0, 1, 0.025001
MarketGood = commodity_oxygen, 0, -1, 0, 0, 1, 0.100001
MarketGood = commodity_water, 0, -1, 0, 0, 1, 0.033334
MarketGood = commodity_food, 0, -1, 0, 0, 1, 0.017242
MarketGood = commodity_diamonds, 0, -1, 0, 0, 1, 0.001516
MarketGood = commodity_alien_organisms, 0, -1, 0, 0, 1, 0.010001
MarketGood = commodity_alien_artifacts, 0, -1, 0, 0, 1, 0.003705
MarketGood = commodity_luxury_food, 0, -1, 0, 0, 1, 0.006251
MarketGood = commodity_fertilizers, 0, -1, 0, 0, 1, 0.033334
MarketGood = commodity_mox_fuel, 0, -1, 0, 0, 1, 0.004168
MarketGood = commodity_H_fuel, 0, -1, 0, 0, 1, 0.003334
MarketGood = commodity_basic_alloys, 0, -1, 0, 0, 1, 0.025001
MarketGood = commodity_super_alloys, 0, -1, 0, 0, 1, 0.008334
MarketGood = commodity_high_temp_alloys, 0, -1, 0, 0, 1, 0.012501
MarketGood = commodity_superconductors, 0, -1, 0, 0, 1, 0.010001
MarketGood = commodity_optical_chips, 0, -1, 0, 0, 1, 0.012501
MarketGood = commodity_mining_machinery, 0, -1, 0, 0, 1, 0.006668
MarketGood = commodity_construction_machinery, 0, -1, 0, 0, 1, 0.010001
MarketGood = commodity_pharm, 0, -1, 0, 0, 1, 0.006580
MarketGood = commodity_ship_hull_panels, 0, -1, 0, 0, 1, 0.012501
MarketGood = commodity_polymers, 0, -1, 0, 0, 1, 0.016668
MarketGood = commodity_optronics, 0, -1, 0, 0, 1, 0.004763
MarketGood = commodity_consumer_goods, 0, -1, 0, 0, 1, 0.016668
MarketGood = commodity_luxury_consumer_goods, 0, -1, 0, 0, 1, 0.005557
MarketGood = commodity_engine_components, 0, -1, 0, 0, 1, 0.004445
MarketGood = commodity_terraforming_gases, 0, -1, 0, 0, 1, 0.200001
MarketGood = commodity_cardamine, 0, -1, 0, 0, 1, 0.001334
MarketGood = commodity_sidearms, 0, -1, 0, 0, 1, 0.003572
MarketGood = commodity_tradelane_parts, 0, -1, 0, 0, 1, 0.007144