I’d recommend against ordering yourself and doing the tramite with the aduana and AFIP - things here are unpredictable, inefficient and non-transparent. You’ll often end up going round circles and wasting lots of time in queues here, there and everywhere.
I’ve used Grabr 50+ times in my time here. It works very well. You often get the same people bringing the products. When you get to know them, you can order with them directly (instead of through Grabr) and save on fees.
I guess it depends what you’re looking to buy. Grabr works for smaller items that can go in normal luggage, like clothes. shoes, tech, supplements etc It would’nt work for large things.
Brazil has high taxes on tech, but apparently is ok for clothes. Chile / Paraguay better for tech.
grabr.io
