how rare are downtown cards many printed per player? Why are downtowns so expensive.

Booster VERSUS ROYAL KNIGHTS [BT13] BT13-004 U Digi-Egg Lv.2 Budmon Color Green Form In-Training Type Vegetation Card Text 2 [Inherited Effect] [Your Turn] While your opponent has a suspended Digimon, this Digimon gets +1000 DP

These are available in non-foil and traditional foil in Beyond Boosters and Collector Boosters

S8A Pull Rates & Box EV Breakdown S8A pull rates are estimated from community opening data

These cards are now Forbidden: K9-04 NOROI Naturia Rosewhip CXYZ Gimmick Puppet Fanatix Machinix These cards are now Limited: CupsyYummy Fairy Tail - Snow Maliss White Rabbit CupsyYummy Way Branded-Fusion Metamorphosis Premature Burial Radiant Typhoon Chant Rahu Dracotail Synchro Overtake These cards are now Semi-Limited (Limited 2): Dracotail Lukias Dracotail Arthalion These cards are now Unlimited: Mind Control Zoodiac Barrage Konami's official site says to expect the next banlist update "after a few months." That's vague, but we typically expect to hear of changes every three to four months

Its not a bad ability at all, although its probably a little underpowered compared to the cards printed nowadays