While damaged copies are relatively inexpensive, clocking in at under $20, you'll need to pay about $27 for an MP copy, $35 for an LP, and as much as $63 for one in NM condition
Which is, inconveniently, most FNMs
If youre putting together an Ancient-themed deck and are looking for a nice version of Professor Sadas Vitality to use in it, the Special Illustration Rare is going for around $30 as of Paradox Rifts release
In the unusual case where Improvised Arsenal becomes a copy of something else while its second ability is on the stack but before it resolves, the token will enter as a copy of whatever Improvised Arsenal is copying
Heres a quick list of everything you need to know before jumping into a game: You can attack one Energy Card per turn
This free copy needs to be cast as a normal spell, and can be countered, but it's completely free each turn, even if previous free copies have been countered or disrupted