The first session goes better when the goal is not the flashiest locker. The goal is several clean auction runs without running out of cash. A clean run has a simple shape: enter an auction, bid on a storage locker, load the loot into your vehicle, drive back to your shop, sell the items, and use the profit to improve the next run.
The earliest auction area is the best place to learn price limits. A locker with a few visible valuable items can still be a bad buy if those items are heavy, awkward to haul, or mixed with too much low-value clutter. Before the price climbs, decide the highest amount you are willing to pay. If NPC bids push the auction above that number, letting it go protects the cash you need for the next auction.
A won locker should be loaded by value, not by whatever item is closest. A light item with a solid base value is often better than a bulky object that fills the vehicle and sells for little. A valuable mutation is worth making room for, but the base item still matters. A mutation on a weak object can still be worse than a clean high-value item.
Selling before another risky bid keeps the loop alive. Cash sitting inside unsold items cannot pay for the next locker. If the run felt slow because your vehicle filled too quickly, your next improvement should point toward carry space. If unloading and selling caused the delay, the shop side of the loop matters first. The right early upgrade is the one that removes the problem you hit every run.
A new area is better as a planned move than a reflex. Better areas can mean pricier lockers and heavier items, and that punishes players who have no cash buffer. Move up when you can lose one auction, win the next one, and still have enough money to keep playing. That cushion matters more than chasing one lucky locker.
Once the basic loop feels stable, mutations deserve more attention. Gold, Diamond, Void, and Rainbow are rare mutation goals, so they are worth treating as profit signals. They are not a reason to overbid blindly. The visible item, your vehicle space, and your cash buffer decide whether the locker is still worth buying.