what are your top "audio bargins" in your system history?

Inexpensive is rather relative term... Any of this is not an necessity and not "must have", like food - which can, like right now, get unnecessarily expensive. While I am not wealthy nor rich, my understanding of a bargain in this hobby is directly related to the ratio of enjoyment to the price paid. Shorter period I kept it, less of the bargain it was.
Listed are components that I had, or still have and enjoy. And by my definition above, my system is the real bargain. Nordost cables included, and they are not cheap by any measure...

For the money:
Thorens TD160 with SME 3009
Audio Note CD1
Bel Canto S300iU with Dynaudio X12
Ortofon Quintet Black MKI

Overal:
Jelco TK series tonearms; I have 850
Koetsu Black Goldline
Capriccio Continuo Auralea 309
Martin Logan Motion series (HT only)
Any vacuum record cleaner; I bought my VPI 16.5 more than 20 years ago, and it is still doing great cleaning.

Nordost knockoffs cables from China: DIY HiFi store. These I tried on a lark and would up replacing all my WireWorld expensive Series 8 cables and power cords

B&W 802 S3 - bought them in 2001 for only $1200, and still own them

Dunlavy SC-V - my favorite speakers I've ever heard.

Roland 8T amp super sound great build quality.

+1 on Buchardt s400 mkii speakers. I purchased them recently for my second system and have been utterly impressed. The base response of these speakers impart a warm, easy-to-listen quality. They are keepers for the price.