Absolutely. Since you're selling the Apollo Solo USB, I'd make the description sound professional while being transparent about the UAD software/account situation. I would not promise that any personally purchased UAD plug-ins will transfer, because UAD plug-in licences can be account-related.

Reverb description — copy and paste:

Universal Audio Apollo Solo USB – UAD Audio Interface

Selling my Universal Audio Apollo Solo USB audio interface. This is a compact, professional-quality USB audio interface with excellent conversion, Unison microphone preamps and onboard UAD DSP processing. It is particularly well suited to recording vocals, instruments, podcasts and home/studio production.

The Apollo Solo USB works with UAD Console, Universal Audio's dedicated control software. Console gives you control over the Apollo's inputs, outputs, monitoring, routing and gain, while also allowing you to run UAD plug-ins in real time while recording. One of the biggest advantages is being able to monitor your microphone through UAD processing with extremely low latency rather than relying entirely on your DAW for monitoring. Universal Audio

The interface also features Unison preamp technology, allowing you to use compatible UAD preamp and channel-strip emulations while recording. The Apollo Solo USB includes UAD plug-ins as part of its included software bundle, including classic compressors, EQs, preamps, reverb and guitar amp plug-ins. Depending on the specific Apollo Solo USB software package/account, these can include titles such as the UA 610-B, 1176LN Legacy, 1176SE Legacy, Teletronix LA-2A Legacy, Pultec EQP-1A Legacy, Pultec Pro Legacy, Ampeg SVT-VR Classic, Marshall Plexi Classic, Precision Channel Strip, Precision Reflection Engine, Precision Delay Mod and RealVerb Pro. Universal Audio

Please note regarding UAD software: UAD plug-ins and licences can be associated with the owner's Universal Audio account. I am in the process of checking/removing my personal account registration from the device and will provide the buyer with the appropriate information needed to register/use the Apollo. I cannot guarantee that any additional UAD plug-ins personally purchased by me will transfer with the hardware. The included software should therefore be considered subject to Universal Audio's current registration/licensing policies.

The Apollo itself is in good used condition and has been used as part of a home/studio setup. There may be minor cosmetic marks consistent with normal use, but nothing that affects the operation or audio performance of the interface. Please look carefully through all photographs as they form part of the description and show the exact item you will receive.

The Apollo Solo USB provides up to 24-bit/192 kHz audio conversion, two microphone/line inputs, a front-panel Hi-Z input and headphone output, with UAD processing handled by the Apollo's onboard DSP. It connects to Windows computers via USB 3 and is designed specifically as a compact desktop recording solution. Universal Audio

Included:
• Universal Audio Apollo Solo USB
• Power supply
• USB connection/cable if shown in the photographs
• Any additional accessories specifically shown in the listing photographs

Please check the photographs carefully for the exact contents of the sale.

A great option for anyone looking to get into the Universal Audio ecosystem without buying a larger Apollo interface. The combination of the Apollo hardware, UAD Console and realtime UAD processing makes it particularly useful for vocal recording and tracking.