Check out New420guy seeds, he has a Santa Marta Columbian. I just finished 3 of them, they were heavy yielders, and I like the buzz, although the plants are obviously hybrids, but I doubt this was done by the seller. The plants have 2 phenos, one actually turns golden yellow in senescence, the other turns purple. Very good calyx to leaf ratio, with high resin production. The buzz is more like I remember weed in the old days, than how the new "strains" make you feel. I texted the seller to ask if he crossed it, and he said no, he had received the strain from a friend sometime around 2015.
Having said that, I would estimate the potency to be in the range of 15%, which is where I like to be these days- I'm not wanting to be incapacitated, just functional/feel good. On a side note, I did a 72 Colombian Gold from USC. Let it go for 19 weeks at chop. Not impressed. Smells and tastes like hay, even after a long cure. But I am starting to think that the nutes I have been using might be the problem, since the terps on several recent grows have been unimpressive, but huge yield, great resin production and potency.
Hope that helps, sorry for rambling!