I like your second idea about prices of a item falling and rising. It bring more realism to the game involving prices.
Your first idea is what I currently hate. All miner know that money flows when you got a mining operation going on (3+ miners and 2+ transports). What you don't understand is we can't always be doing these so we have to solo mine a lot which has its own problems (pirates). Our only profit is how much we sell it to traders, which a haggle till I get a good price, which is normally 5.5K per unit right now. Selling for 1k per unit is a bad idea, way too low for solo mining. Also, just because we are mining never means theres a trader sitting 10K from your ship waiting on your gold.
