(Great Value, asking $650 for the kit, transfer switch ready):
Westinghouse 9500 Peak Watt Dual Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas & Propane Powered (orig. $950). Also included: cover ($20) and Champion 25’ 30 Amp 250 volt Generator Power cord for Manual Transfer Switch (L14-30P to L14-30R) ($50). Here are the original product links and prices: