Can a person still buy an Indulgence?
No. Some indulgences tied to a particular location (a particular shrine or the like), and getting to them often requires some money, but the indulgence for almsgiving (the "bought" indulgence) was eliminated sometime either around the time of or at Trent.
No. Never could, either. Almsgiving was once considered an indulgenced act ... but misconstrual and abuse led to scandal, so that was revoked.
If one can't state one's "opponent's" position clearly, completely, and correctly, in terms with which he would agree, and which he would find inoffensive, one has absolutely no business commenting on the matter.
Sure. How much money ya got?
:)