no deals I am aware of, but more info from you will get better recommendations specific to your purpose
vocal mic or instrument mic?
walking around, or on a mic stand?
how many people will use the mic at the same time?
are you intending to plug the mic into the PA50, AC33 or BOTH at the same time? (for that you'd need a mixer that has dual outputs)
IIRC, las time I was looking the least expensive 'handheld' cardioid vocal mic, with the required radio reciever was either a Samson or Behringer, starting @ ~$129.
I remember seeing A VocoPro unit, which had 2 actual mics, each on their own channel, bundled with a single receiver that handled both mics, and was ~$199, they sell it as a 'karaoke' mic, but it should work fine for vocals and ukes.
I have not used any of these myself, as I tend to go a little higher end with either AKG or Electrovoice, but their prices tend to start ~@$399...
If you are in the USA, check out sweetwater.com, the have free shipping and free 2 yr warranty on everything they sell, and are in Fort Wayne, IN, (centrally located) so shipping to most points in the USA is 3 days. Also, I've found that B&H Photo in NYC (bhphoto.com) is often like 20% cheaper than almost every other audio dealer, offers free shipping and also has a HUGE selection of all kids of microphones. Both sites run deals every week.
OTOH, For a wired mic, many folks will probably tell you to just get a Shure SM58 or SM57, but they offer a cheaper model that has the same capsule and electronics that is about half the price, the Shure PG48 and PG47, Shure also makes wireless versions of these, but they start @ ~$249.