[New Player] What're your favorite budgetish gun builds for 100-150k?

Title. New player and I've unlocked the flea market and I've got not a lot of money but like 750k roubles and I wanna try out some guns that aren't bootleg ass stuff I've taken from scavs and basically unmodded trader weapons.

What're some of your favorite gun builds for like 100-150k, preferably for each range? I hit 15 so I have access to the flea market now as well