I think I found a more comprehensive list of compatible phones of the time.
So I dug around a bit, and just by picking a model at random,
I found a listing on eBay for the Sharp 802SH for $44.99 + shipping (does not include a charger but does have the battery):
https://www.ebay.com/itm/166018715379
This is the text from your screenshot of the archived page:
Pied Piper(アプリ)対応機種一覧
703N, 703SH, 703SHf, 802N, 802SH, 803T, 804SH, 902SH, 902T, 903SH, 903T, J-SH53, V501SH, V501T, V502T, V601SH, V601T, V602SH, V602T, V603SH, V603T, V604T
©2007 NBGI
This is a PDF of various cell phone models released in Japan in May 2008, uploaded by user edgezero: https://www.scribd.com/doc/39881529/tekigou
Document Information
This document lists mobile phone models released by various manufacturers in Japan in May 2008. It separates the models into categories for NTT DoCoMo FOMA, WCDMA, and SoftBank 3G networks. For each manufacturer, it lists the phone model names and numbers. Key phone models are noted as having particular features like "HIGH SPEED" or special editions.
Original Description:
Original Title:
tekigou
Copyright:
Attribution Non-Commercial (BY-NC)
Available Formats
Download as PDF, TXT or read online from Scribd
And here's another site that lists very detailed specs for various phones, including the model I found on eBay:
Softbank mobile devices.
mobilofant.com
Softbank 802SH capabilities and properties.
mobilofant.com
And a search for Vodafone on Mercari via Buyee:
Not sure how much this helps, if at all, but figured I'd at least link what I happened to find.