They were printed only during a short early window of the 1999 Base Set before Wizards of the Coast added the drop shadow, after which the Unlimited run printed in huge numbers
Really dont know what your focus will be but dont recommend these Overall vesides this thread the bulbapedia topps page has quite good info of these as set lists with pics and holo variants and when you are more familiar with them you can track down the prices of certain cards and prints but like said the prices arent very stable
However, in decks that play fewer elements, these artifacts can shine and give a player an excellent head start
This means setting up in a dark room, with an overhead light, a card mat, an empty slab, and Giovanni's card cleaning kit should be close by
It still won't assign damage to the defending player, but it is more likely to survive combat with the remaining Creature
However, if a single creature you control with lifelink deals combat damage to multiple creatures, players, planeswalkers, and/or battles at the same time (perhaps because it has trample or was blocked by more than one creature), the ability will trigger only once