https://www.pcgamer.com/gta-online-kicks-off-contraband-week-with-gunrunning-focused-perks-and-discounts/

GTA Online's latest weekly update adds a host of Gunrunning-focused perks and discounts. For the next seven days, the so-called 'Contraband Week' targets "subterranean entrepreneurs", who deal in illicit goods.  

Which in practice sees Bunker-made materials netting players double GTA$ and RP by way of Sell Missions—while Research teams operate 50 percent faster than usual. If you're yet to get in on the underground act, the Farmhouse Bunker is half price (now $1,187,500) for the next seven days; whereas the Thomson Scrapyard and Smoke Tree Road bunkers are subject to 45 percent and 40 percent discounts respectively (now $1,259,500 and $1,323,000).  

All three of the above spots are better-positioned than my own Paleto Forest Bunker, which lies idle in the middle of nowhere. It also costs a bloody fortune to run—so much so, that I might trade it in this week in light of these deals.