They are looking for a bargain, used vessels. I don’t think they want to spend the money on new spanish vessels.
Also, as the article states, they already have some Perrys.
For what they are using them for, the Perrys are fine. They are basically coastal defense vessels, not blue water vessels. We still use them for interdiction duty, something they are well suited to.
The “Gelded Perrys” are only good for interdiction work. After the removal of the Mk 13 GMLS, they are nothing more than oversized Coast Guard Cutters with ASW capabilities. The Mk 13 expanded the capabilities with SM-1MR and Harpoon missiles.
Would Taiwan be planning to install a Mk-41 VLS to be loaded with ESSM’s (enhanced Sea Sparrows)? They already have an anti ship missile, which is derived from the Israeli Gabriel.