There's something incredibly satisfying about this card.

It's a super-charged Aesop's Pawnshop in event form with two cards for your trouble! Since you don't want to deplete your stock of cards twice as fast (usually), I'd recommend against having both this and the shop. Since this only hits programs, it's a great pair with Cache for net 5 and two new cards! Turn your dead Pelangi into cash! Recycle that digital doggo!

It's also great to smelt your unused silver bullets like Misdirection and Clot into something useful outside of their given matchups. Also, if you have memory to spare, it's perfect for the rest of your SMCs after your rig is up to speed.

Hayley is typically the best with this, as her ability thrives on having a ton of low-cost cards at the ready. Obviously, it also loves to be in Levy AR Lab Access decks for even more profit!

Also, I don't know what its art is supposed to be, but I think it's a re-purposed typewriter turned into a music box. It's lovely regardless!

This card also thrives in Reavershop Wu.
Step 1. Draw Spec Work.
Step 2. Wu to install Harbinger. Don't use the one in your hand or on the table, pull it from your deck if you can.
Step 3. Spec Work the Harbinger, drawing 3 cards and netting 3. (It's called Reavershop, you have ways to ensure Reaver is on the table by turn 1 or 2.
Step 4. Sell that not-at-all removed from game heap of trash at your local pawnshop for another 3 and an additional card draw at the start of next turn.
Bonus round: Clone Chip the Harbinger back into play on the corp's turn just before your turn begins, triggering a Reaver draw, pawn is for a second draw and 3 at the beginning of your turn.
Although anyone could gain the efficiencies that Reaver offers, the combo is particularly effective for Wu because she will reliably have Reaver in play and needs only 1 to both draw and install Harbinger. Sweet, sweet efficiency.