Not sure where you are finding these for 169-190.00. I am finding them on google for 1400 on up..Anyone can buy an AED - Philips Heartsmart. They run around $169-190. When I bought mine, they were $750 (taking care of elderly mom at the time with heart issues). Hard excuse not to have one now if you have the means, very simple training is included in CPR class. The machine reads the heart rhythm for you and determines whether rhythm is present/shockable.
I wouldn't be surprised if the "SADS" hears do not set off (are not shockable) an AED; so are pretty much DRT (or DOS). I don't know the circumstances from Damar Hamlin - but my guess is that reason for 10 minutes of CPR is that he initially had no electrical activity - EPI was likely given via ET tube which alone with compressions induced a shockable rhythm to occur. Super rare but that's why its in the protocol for ACLS.