Probably missing a space between the 29 and the 20. I read it as 29 doses at 20mg each. You can get generic Tadalafil in liquid for $32 a vial which is the equivalent of 45 doses. $0.71 cents a dose. So what he has is worth about $21 to thse that know where/how to acquire it for best value.
https://rasaresearch.com/product/tadalafil/
Best value IMO is sildenafil, qty 90 from Mark Cuban's Cost Plus Pharmacy. Just $17.25 for qty 90 100mg doses delivered to you via US Mail with a prescription. Under 20 cents a dose.
In otherwords there is not much reason to risk an illegal transaction over meds. Everyone here takes enough risk already.