A bit of background information on the 2003 Netpro sets:
Netpro released a few different sets in 2003. Apart from the Elite /2000 set, the Glossy edition of the base set and the International Series cards are the two rarest "sets" in circulation. The Glossies had a print run of just /5000. The International series had a print run of just /10000. Compare these numbers with the print run of the base edition set (which look like the glossies), which had a print run of over /40000. If you head over to PSA, you can see that the Glossy and International Series cards are very low in total population.
As of 1/21/2022, there are only:
- Glossy: 333 Nadals; 245 Federer; 116 Serena; and 68 Williams Sisters graded.
- International Series: 480 Nadal Int'l Series; 476 Federer; 569 Serena graded.
Compare those numbers with the base set which already has:
- 6,588 graded Serena; 2,471 graded Nadals; and over a thousand graded Federers!!
As such, the Elite /2000, Glossy Base Set /5000, and Int'l Series /10000 are the best long term investments as there are simply less of them in circulation. Please feel free to reach out if you have any further questions.