Jinhao X450 - £3.50 from eBay back in 2015. Writes like a dream, without any leakage issues. Due to the nature of Chinese characters the nibs tend to come up a bit on the fine side, but the mediums (and broads, if you can find them) are excellent.
Which signature on the pen?When I retired from teaching I bought a Mont Blanc Alexandre Dumas and sent it to Greg Minuskin for a sharp cursive italic grind.
I use only Galilio Manuscript Brown in it.
Had a phone interview with a woman collector in Mexico to see if I were worthy of the pen. She would only sell it to someone who "deserved"it.
I passed the test!
Toledo.
Did you go with the 700 or 900?